Question

A block of mass m is resting on a wedge of angle $\theta$ as shown in the figure. The wedge is given an acceleration $a=gcot\left(\theta \right)$, then speed of block after $t=0.5$ sec will be

• A. 4 m/s
• B. 5 m/s
• C. $6cos\left(\theta \right)$ m/s
• D. $6sec\left(\theta \right)$ m/s

Answer 1

The correct option is B 5 m/s

At this acceleration , N becomes zero and block will fall freely



$N=0$
$v=0+at=10\times \frac{1}{2}=5m/s$